See your eye doctor: For your symptoms of floaters you should see your eye doctor right away to see if it's the sign of a serious problem. As for your other symptoms, they should warrant some further testing.
I believe that it is correct to say that RNA is not replicated, but reproduced. DNA, what I know currently, is the only one that replicates itself.   Plus, to my knowledge, you don't need to copy a RNA strand.
In the case of RNA replication, there are three. They bond with the anticodons in tRNA. Also, in DNA guanine pairs with cytosine and thymine pairs with adenine. In RNA thymine is repalced with uracil. Say the Dna transcript is AUG(start codon methionine)TTACGA(stop codon) then the mrna would be AAUGCU. Then the trna would be the dna transcript. you do not include the stop codon or the start codon. the mrna transpcict is also used to find out the amino acids.